Beat Vitor. Beat Yoel Romero. Beat Bisping. Then probably lose to Weidman or Rockhold. But it isn't unfathomable that he could eventually be champ as odd as that is. I don't think it will happen, but you never know, I mean Bisping is champ right now...

2 wins, including Vitor, b4 he gets any run at a title fight.
his best bet is the Bispy route, as a late replacement.
he should make sure he fights on every card with the MW champ defending, that gives him the best chance as a sub.